Two-year real-world retrospective safety evaluation with onabotulinumtoxinA across multiple therapeutic indications:...

OnabotulinumtoxinA (onabotA) is approved for the treatment of various therapeutic indications, which require retreatment. In clinical practice, many patients receive onabotA for multiple therapeutic indications concomitantly over extended time periods; however, there is limited long-term utilization and safety data for treating comorbid indications. SYNCHRONIZE, a 2-year, multicenter, retrospective observational chart review study in 10 US clinics, describes onabotA real-world utilization and safety in adults treated for ≥2 therapeutic indications within repeating 3-month periods for up to 7 treatments. This analysis assessed the long-term onabotA safety profile for multiple therapeutic indications by analyzing the incidence of treatment-emergent adverse events (TEAEs). Of 279 patients treated for ≥2 different therapeutic indications across all treatment combination groups in Period1, there was a gradual decrease to 80 patients at the last treatment period. The overall mean onabotA treatments over the study period was 9.3 (range: 2-48). Across treatment periods, most patients had a treatment interval between different indications of ≤24 h (range: 62-98 %) and received ≥200-<400U of cumulative 3-month dosages for multiple indications (range: 43 %-50 %) with a mean 3-month dose from 231.8 to 287.0 U. In total, 28.7 % of patients reported ≥1 TEAE after Period1; this proportion remained broadly constant across treatments (range: 28.3-31.8 %). Overall, the most common TEAEs across treatments were UTIs (range: 0.7-5.7 %), neck pain (range: 3.7-9.1 %), headache (range: 2.9-6.5 %), and migraine (range: 2.5-6.4 %). There was no apparent trend between TEAE incidence and treatment intervals nor cumulative 3-month dose categories for multiple indications. No patients were determined to have lack of effect based on clinical objective measurement. OnabotA showed a safety profile with no new signals in patients treated concomitantly for ≥2 therapeutic indications over repeat treatments up to 2 years. TEAEs across treatment periods were commonly related to the site of injection and were consistent with those previously reported for individual indications.